Tiles or slate: start with the whole roof.

Start below the surface

The covering is the visible part of a pitched roof, but it depends on the structure beneath it. Roof pitch, supporting construction and the condition of existing layers all influence the choice.

Compare complete systems

Clay, concrete and slate have different dimensions, weights and fixing arrangements. Compare the whole system, including underlay, battens, ventilation and the ridge and verge details.

Keep the character

The right finish should suit the building as well as the specification. Samples and roof-layout drawings can help make the decision easier to understand.

Before you commit

Ask for a scope that names the proposed roof covering and the supporting details. A project-specific survey and specification should guide the work.